okay so the ghost mouse is just a mouse recording program, you can use any one you like but thats the one i use personally.
you will need to download bluestacks and install it/ run it and sign into your gmail account to access the google play store.
after you have downloaded the osrs mobile app, download the ghost mouse and a random mouse clicker (https://www.ghost-mouse.com/) (https://sourceforge.net/projects/random-mouse-clicker/)
so get everything you need for the skill or thing you want so your ready to just get going with skilling or whatever you like, set the size of your bluestacks so it covers like half of your screen or a little more, and open google chrome beside it so you can fully play osrs and use the internet, search for stopwatch and googles stopwatch should pop up.
say your fletching, get all the items you need and make sure you have entered your bank before if you have a pin, start recording with your ghost mouse and press start on the stopwatch so you can time the precise time you have recorded for and make sure your standing right infront of the bank or bank chest ready to 1 click into it, open your bank get out the logs or the unstrung bows and bow string and finish like 3-4 inventories then deposit everything and exit the bank so your standing exactly where you where when you started recording, then stop recording and stop the stopwatch on chrome, if you where fletching the stop watch should be at like 2 minutes 21 seconds or something like that after like 4 inventories, now open the random mouse clicker and type how long you where recording for into it, so 2 minutes and 21 seconds is 141 seconds... so set the random mouse clicker so it clicks every 145 seconds- 149 seconds i just add like 4 seconds that way i know it has enough time to reset the recording properly, then on the random mouse clicker you can set where it will click, set the area that it will click on the play button on ghost mouse, so every 145 seconds the random mouse clicker will click play on your recording and start your training for you. best of luck hit me up if you need any more help